import numpy as np

t1 = np.array([1, 2, 3])
print(t1)
print(type(t1))

t2 = np.array(range(1, 10))
print(t2)

t3 = np.arange(10)
print(t3)

t4 = np.arange(2, 10, 2)
print(t4)

print(t4.dtype)

t5 = np.array(range(1, 4), dtype=float)
print(t5)

t6 = t5.astype("int8")
print(t6)
